If I recall correctly, there is a shop on the Peninsula (Belmont, iirc) that did the mod early on. If I find the thread (video online, too), I will post it up.
This post may be better if placed in the Regional -California forum, too.
2011 e92 M3: AW/blk zcp, dct
2008 Civic Si FG2 ASM/blk
2005 e46 M3: SG/blk zcp, 6MT (sold)